topic Re: Circular pattern - rotatate elements until contact (like roller blinds) in Inventor Forum

Circular pattern - rotatate elements until contact (like roller blinds)

j.pavlicek — Fri, 05 Jan 2018 09:27:35 GMT

Hello,

I have a circular pattern in assembly which contain part(s) which can be rotated (around axis parallel with the pattern axis). You can imagine it as roller blind but around circle.

I need to find the closed position. But cannot imagine how. One edge shape is line (bottom) and other is spline (up). Here is detail. Dimension 3,504 is estimated (and wrong)

Thank you for suggestions!

Re: Circular pattern - rotatate elements until contact (like roller blinds)

Thomas_Savage — Fri, 05 Jan 2018 09:37:02 GMT

Hello @j.pavlicek

I have attached a screenshot.

Try the Component Priority, which i have circled in my screen shot.

Or Part Priority.

Instead of Select Faces and Edges.

Thomas.

Re: Circular pattern - rotatate elements until contact (like roller blinds)

j.pavlicek — Fri, 05 Jan 2018 10:55:36 GMT

Thank you, but it is not what I want.

I need to rotate elements in a pattert to position that distance between them will be 0 (ZERO)

I cannot link elements with a tangent constraint, Because I can move only with "Element 1" (others copy rotation from it - it's required behavior).

Re: Circular pattern - rotatate elements until contact (like roller blinds)

johnsonshiue — Fri, 05 Jan 2018 11:03:17 GMT

Hi! You might want to use Contact Solve. Select all these parts and right-click -> check Contact Set. Then go to Inspect tab in the ribbon -> click on Activate Contact Solver.

Please note that Contact Solve is a compute-intensive operation. Once you are done with the analysis, make sure you turn it off.

Many thanks!

Re: Circular pattern - rotatate elements until contact (like roller blinds)

j.pavlicek — Tue, 16 Jan 2018 13:33:30 GMT

It's not working for me.

Contact set

Re: Circular pattern - rotatate elements until contact (like roller blinds)

JDMather — Tue, 16 Jan 2018 13:39:04 GMT

This is all wrong.

You need to solve for Contact between only two components. (Keep it simple.)

It is best to Drive Constraint an angle rather than drag with mouse.

Or even better - Environments>Dynamic Simulation 2D Contact Joint.

Attach your assembly here if you can't figure it out.

Re: Circular pattern - rotatate elements until contact (like roller blinds)

j.pavlicek — Tue, 16 Jan 2018 14:04:33 GMT

"You might want to use Contact Solve. Select all these parts and right-click..."

But I get same behavior when a contact set is set only for first two elements

Attached zip contains a dummy assembly - I cannot share original parts.

Re: Circular pattern - rotatate elements until contact (like roller blinds)

JDMather — Tue, 16 Jan 2018 14:18:01 GMT

Did you test your *.zip?

Re: Circular pattern - rotatate elements until contact (like roller blinds)

j.pavlicek — Tue, 16 Jan 2018 14:30:49 GMT

Yes, and get this result

Contact set:

Used files extracted from ZIP to different path than original project.

Re: Circular pattern - rotatate elements until contact (like roller blinds)

JDMather — Tue, 16 Jan 2018 16:13:18 GMT

@j.pavlicek wrote:

Yes, and get this result

Used files extracted from ZIP to different path than original project.

Hmmm.

When I download the zip file I get an error message and the zip file size seems a bit small, but that does not necessarily mean anything.

Any one else able to test the attached zip file?

Did you use Windows to zip this folder?

Re: Circular pattern - rotatate elements until contact (like roller blinds)

j.pavlicek — Tue, 16 Jan 2018 16:30:29 GMT

I used 7zip. I use it for packing zip for Windows Explorer users for years without any problem. Interesting.

Attached ZIP is made by Windows Explorer.

Re: Circular pattern - rotatate elements until contact (like roller blinds)

Anonymous — Tue, 16 Jan 2018 16:37:30 GMT

I would imagine that checking 2 parts will give you exactly the same result as checking the entire assembly, since it is a regular pattern. So why not restrict the pattern to 2 occurrences for checking interference ? You can "parameter up" to a full circle afterwards.

Re: Circular pattern - rotatate elements until contact (like roller blinds)

JDMather — Tue, 16 Jan 2018 18:24:15 GMT

You can set the number of steps to a higer resolution or st as angle increment value.

Contact Set is not needed.

I have set up limits of travel in the attached.

Change the -10 to say, -90 if desired greater opening.

You can drag by mouse or change Resting Position as desired.

Re: Circular pattern - rotatate elements until contact (like roller blinds)

j.pavlicek — Thu, 18 Jan 2018 07:36:47 GMT

Thank you. This is unexpected approach for me, but works great!

Re: Circular pattern - rotatate elements until contact (like roller blinds)

j.pavlicek — Tue, 06 Feb 2018 13:24:18 GMT

Interference issues (bolted connection):

If you want to use this method, but you there are some bolted connection. It fails in first step (this bolted connection are evaluated as interference and Driving is stopped).

Select all and suppress. Then write name of the main parts in the pattern into search field. Select them (hold CTRL) and disable suppress on them. Suppressed parts are not involved in the interference calculation.

I also suggest this approach, when you use this method in assembly with other parts - suppressing of other parts would speed up the process.